Miner&#39;s lamp.



PATENTED OCT. 16, 1906.

0. POWELL.

MINERS LAMP. APPLICATION FILED ma. 9. 1906.

INVENTOR Y lZZZeS 7% ;45 BY HIS FTTORNEYSI %N ESSES UNITED STATES PATENT OFFICE.

MINERS LAMP- Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed February 9, 1906- Serial No. 300,350.

To all whom it may concern.-

Be it known that I, CHARLES POWELL, a subject of the King of Great Britain, residing at Coal Creek, British Columbia, Canada,

' have invented certain new and useful Improvements in Miners Lamps, of which the following is a specification.

The object of my invention is to provide a safety-lamp for miners that may be used with perfect safety for illuminating purposes, and also as a shot-lighter."

Ordinarily for illuminating purposes, as where a workman is inspecting a mine, the workman carries a safety-lamp with a mag netic lock which he cannot himself open, but

of the ordinary form, and preferably a magnetic lock is employed; but the glass cylinder of the lamp has a hole made in it which receives a metallic tube carrying a diaphragm of wire-gauze, of such mesh that the flame cannot pass through it, and said mesh in no case to have less than seven hundred and eighty-four apertures to the square inch, but which permits the insertion of awire which may be heated red hot and then withdrawn and employed to ignite the fuse. The gauze may be protected by a plug fitting the outer end of the tube and the plug may be secured to a chain in turn attached to the frame of the lamp. The shot-lighter or wire may also be attached to the chain.

In the accompanying drawings, I have shown how my improvements may be applied to a miners lamp of well-known construction.

Figure 1 is a view, partly in elevation and partly in section, of the lower portion of a miners lamp of the construction known as the Wolf lamp. Fig. 2 is a side elevation of the lamp shown in Fig. 1. Fig. 3 shows a horizontal section on the line 3 3 of Fig. 1. Fig. 4 is a detail view in section of the tube and wire-gauze which are inserted into the glass cylinder of the lamp.

As the main body of the lamp may be of any approved construction, and as the parts shown, with the exceptions hereinafter specified, are old, they will not be described in detail. It may be stated, however, that it can be assumed that the parts of the lamp are locked together by what is known as a magnetic lock.

The glass cylinder A has a hole made in its side, which hole may be three-eighths of an inch in diameter. Through this hole extends a metallic tube B, and this tube carries on opposite sides of the glass A metallic washers C, which are soldered to the tube B, and thus hold it firmly in place, as the washers fit tightly against the glass A. Preferably the tube extends a short distance outwardly and inwardly from the glass and the outer portion of the tube is formed with a right-angled slot D. Within the tube is arranged a diaphragm E of wire-gauze. This is of such mesh as to prevent the passage of flame, but preferably of such mesh as to permit the insertion of a rod of wire of 30 gage. The diaphragm E may be attached to the tube in any suitable way. It is shown in Fig. 5 as being attached to a ring e, which may be tightly fitted in the tube B and may, if preferred, be soldered thereto. By this device the lamp may be used to heat a wire which may be employed to ignite a fuse, and the same lamp can be employed for illuminating purposes. Preferably I employ a plug F, which may be headed, as shown, and which is provided with a pin f, adapted to engage the slot D after the manner of a bayonetjoint. By the use of such a plug the wiregauze may be protected, although the use of a plug is not absolutely essential.

When a plug is employed, it is preferably attached to a chain G, which may be connected with one of the posts II of the frame of the lamp, as indicated in Fig. 2. I may also attach to the chain the shot-lighter I, which, as shown, is merely a short length of wire. This may be passed through the wire-gauze into the flame of the lamp when the plug F is removed.

I claim as my invention- 1. The combination with the glass cylinder of a miners lamp, of a tube extending therefrom and firmly connected therewith, and a piece of wire-gauze within the tube of such mesh as'to prevent the passage of flame but permit the insertion of a wire for shot-lightmg.

2. The combination with the glass cylinder of a miners lamp, of a metallic tube extending through the glass, wire-gauze within the tube of such mesh as to prevent the passage In testimony whereof I have hereunto subof flame but permit the insertion of a Wire for scribed my name.

CHARLES POWELL.

Witnesses:

H. HEROHMER, G. F. JOHNSON. 

